Low cost solution to the heavy weight objects movement, Wheel casters like our VXB005150WCB1 are used to roll your machine or equipment back and forth. Diameter size of the caster wheel has a metric standard 150mm which is equal to 5.906" inch with imperial units. The thickness of the wheel is 50mm or 1.969" inch. The caster dimensions heightwise is 190mm/7.480" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 115mm x 100mm x 5.5mm with the holes distance of 72mm x 85mm. The weehl core material is Cast Iron and has a Cast Iron tire with a low friction Roller bearing. Bearing in mind that every caster wheel has the load capacity of 661 lb with a Swivel and Center Brake type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB005150WCB1 in order to get one :).